import 'package:flutter/material.dart';

import 'package:flutter/foundation.dart';
import 'package:flutter_custom_calendar/configuration.dart';
import 'package:flutter_custom_calendar/flutter_custom_calendar.dart';
import 'package:flutter_custom_calendar/utils/date_util.dart';
import 'package:flutter_custom_calendar/widget/month_view.dart';
import 'package:provider/provider.dart';

/**
 * 周视图，只显示本周的日子
 */
class WeekView extends StatefulWidget {
  final int? year;
  final int? month;
  final DateModel? firstDayOfWeek;
  final CalendarConfiguration? configuration;

  const WeekView(
      {required this.year,
      required this.month,
      this.firstDayOfWeek,
      this.configuration});

  @override
  _WeekViewState createState() => _WeekViewState();
}

class _WeekViewState extends State<WeekView> {
  late List<DateModel> items;

  Map<DateModel, Object>? extraDataMap; //自定义额外的数据

  @override
  void initState() {
    super.initState();
    extraDataMap = widget.configuration!.extraDataMap;

    items = DateUtil.initCalendarForWeekView(
        widget.year, widget.month, widget.firstDayOfWeek!.getDateTime(), 0,
        minSelectDate: widget.configuration!.minSelectDate,
        maxSelectDate: widget.configuration!.maxSelectDate,
        extraDataMap: extraDataMap,
        offset: widget.configuration!.offset);

    //第一帧后,添加监听，generation发生变化后，需要刷新整个日历
    WidgetsBinding.instance!.addPostFrameCallback((callback) {
      Provider.of<CalendarProvider>(context, listen: false)
          .generation
          .addListener(() async {
        items = DateUtil.initCalendarForWeekView(
            widget.year, widget.month, widget.firstDayOfWeek!.getDateTime(), 0,
            minSelectDate: widget.configuration!.minSelectDate,
            maxSelectDate: widget.configuration!.maxSelectDate,
            extraDataMap: extraDataMap,
            offset: widget.configuration!.offset);
        setState(() {});
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    CalendarProvider calendarProvider =
        Provider.of<CalendarProvider>(context, listen: false);

    CalendarConfiguration? configuration =
        calendarProvider.calendarConfiguration;
    print(
        "WeekView Consumer:calendarProvider.selectDateModel:${calendarProvider.selectDateModel}");
    return new GridView.builder(
        physics: NeverScrollableScrollPhysics(),
        gridDelegate: new SliverGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: 7, mainAxisSpacing: 10),
        itemCount: 7,
        itemBuilder: (context, index) {
          DateModel dateModel = items[index];
          //判断是否被选择
          switch (configuration!.selectMode) {
            case CalendarSelectedMode.multiSelect:
              if (calendarProvider.selectedDateList!.contains(dateModel)) {
                dateModel.isSelected = true;
              } else {
                dateModel.isSelected = false;
              }
              break;
            case CalendarSelectedMode.singleSelect:
              if (calendarProvider.selectDateModel == dateModel) {
                dateModel.isSelected = true;
              } else {
                dateModel.isSelected = false;
              }
              break;
            case CalendarSelectedMode.mutltiStartToEndSelect:
              if (calendarProvider.selectedDateList!.contains(dateModel)) {
                dateModel.isSelected = true;
              } else {
                dateModel.isSelected = false;
              }
              break;

            case null:

              break;
          }

          return ItemContainer(
              dateModel: dateModel,
              clickCall: () {
                setState(() {});
              });
        });
  }
}